System and method for controlling lighting

ABSTRACT

A controller for controlling lighting in a facility provided by a plurality of lighting fixtures configured for wireless communications, the controller includes a data communication interface and a control module. The data communications interface communicates with at least one of the plurality of lighting fixtures. The control module is configured to provide a control signal to the data communications interface for communicating to the at least one of the plurality of lighting fixtures and for at least one of turning on and turning off the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility. The control module is also configured to determine the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of heat within the facility.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 13/648,933, filed Oct. 10, 2012, which is a continuation of U.S. patent application Ser. No. 12/240,805, filed Sep. 29, 2008, which is a continuation-in-part of U.S. patent application Ser. No. 12/057,217, filed Mar. 27, 2008, all of which are incorporated herein by reference in their entireties.

FIELD

The field of the disclosure relates generally to reduction in energy usage. More specifically, the disclosure relates to systems and methods for intelligent monitoring, controlling and metering of lighting equipment in a facility.

BACKGROUND

This section is intended to provide a background or context to the invention recited in the claims. The description herein may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section.

According to the International Energy Outlook 2006, Report No. DOE/EIA-0484(2006) from the U.S. Dept. of Energy, the world's total net electricity consumption is expected to more than double during the period 2003-2030. Much of the electricity is expected to be used to provide industrial, institutional, commercial, warehouse and residential lighting. Adoption of energy-efficient technologies can help to conserve electricity thereby slowing the growth in both the “base demand” and “peak demand” components of electricity demand. Base demand is the steady-state, or average, demand for electricity, while peak demand occurs when the demand for electricity is the greatest, for example, during a hot summer day when electricity use for air conditioning is very high. Reducing either type of demand is desirable, but a reduction in peak demand generally is more valuable because of the relatively high unit cost of the capacity required to provide the peak demand.

Many facilities (e.g. commercial, residential, industrial, institutional, warehouses, etc.) typically include (or are being modified to include) artificial lighting devices such as high intensity fluorescent (“HIF”) lighting fixtures that reduce the amount of electricity consumed in comparison to other less efficient types of artificial lighting such as high intensity discharge (“HID”) lighting. Although HIF lighting equipment reduces the consumption of electricity required for operation, it is desirable to further reduce the electricity consumed by HIF lighting equipment in a facility. Such lighting devices are often configured for control using relatively simplistic control schemes, such as “on” or “idle” during periods where the facility is regularly occupied, and “off” or “standby” when the facility is regularly unoccupied (typically referred to as the facility's “usage pattern”). It would be desirable to reduce consumption of energy by providing a system and method to permit a power provider to trim or shed certain predetermined loads in cooperation with a facility during peak demand periods. It would also be desirable to reduce consumption of energy during peak and off-peak demand periods by using sensing and control devices to intelligently monitor an environment within a facility to turn-off or reduce power to HIF lighting equipment in the facility, when operation of the equipment is unnecessary, particularly during regularly occupied periods which often correspond to peak demand times for the supplier of the electricity (e.g. utilities, etc.).

What is needed is a system and method for reducing peak and off-peak electricity usage in a facility by intelligently monitoring the need for operation of HIF lighting equipment in a facility, and turning-off the HIF lighting equipment during periods when operation of the HIF lighting equipment is determined to be unnecessary, or when peak demand electric capacity is limited and dictates a reduction in demand. What is also needed is a system and method to reduce electricity usage during peak demand periods by providing a signal from an electricity supplier to the HIF lighting equipment to turn-off certain equipment on an as-needed basis (e.g. during unplanned or unforeseen reductions in capacity, etc.) according to a pre-established plan with the facility to accomplish peak electric supply capacity objectives. What is further needed is a system and method to reduce electricity usage during peak demand periods by automatically providing a signal from an electricity supplier to the HIF lighting equipment to turn-off certain equipment, in accordance with a pre-established plan with the facility, in response to decreasing capacity margins during peak demand periods. What is further needed are suitable sensors operable to monitor the need for operation of the HIF lighting equipment during peak or off-peak demand periods at various locations within the facility. What is also needed is a control device operable to receive an indication of the need for operation of the HIF lighting equipment and to provide a demand-based control signal to turn-off such equipment during periods when operation of the HIF lighting equipment is unnecessary, or override the usage of such equipment when peak demand capacity limitations dictate a reduction in usage. What is further needed is a control device that logs (e.g. records, tracks, trends) the time, duration and amount of electricity that is “saved” by reducing the operation of such equipment, and provides output data to determine the cost savings provided by the intelligent monitoring, relative to the facility's typical usage pattern. What is further needed is a system that communicates with a power provider to permit a user, such as a power provider, to “trim” or “shed” certain loads during peak demand periods by overriding the demand-based control signals. What is further needed is a system that provides a data log of energy reduction (i.e. total reduction and reduction for individual devices) achieved by use of the system, both on a cumulative basis for a designated period of time, and on an instantaneous basis for confirmation by a power provider.

Accordingly, it would be desirable to provide a system and method that permits an energy user and/or a power provider to actively manage and reduce the energy usage in a facility required by HIF lighting equipment, particularly during periods of peak and off-peak demand.

SUMMARY OF THE INVENTION

In an exemplary embodiment, a controller for controlling lighting in a facility provided by a plurality of lighting fixtures configured for wireless communications is provided. The controller includes a data communication interface and a control module. The data communications interface communicates with at least one of the plurality of lighting fixtures. The control module is configured to provide a control signal to the data communications interface for communicating to the at least one of the plurality of lighting fixtures and for at least one of turning on and turning off the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility. The control module is also configured to determine the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of heat within the facility. The control module is also configured to compare the level of heat within the facility with a heat threshold associated with human occupation. The control module is further configured to quantify a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm. The control module is also configured to quantify the reduction in power by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm.

In another exemplary embodiment, a method for controlling lighting in a facility provided by a plurality of lighting fixtures configured for wireless communications is provided. The method includes determining whether to provide a control signal to at least one of the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility. The method further includes determining the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of sound within the facility. The method further includes comparing the level of sound within the facility with a sound threshold associated with human occupation. The method further includes providing the control signal to a data communications interface for communication to the at least one of the plurality of lighting fixtures. The method further includes quantifying a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm. The method further includes storing indicia of the reduction in power in a memory device, displaying indicia of the reduction in power on an electronic display, or storing indicia of the reduction in power in the memory device and displaying indicia of the reduction in power on the electronic display.

In a further exemplary embodiment, a system for controlling lighting in a facility is provided. The system includes a plurality of lighting fixtures, a data communications interface, and a control module. The plurality of lighting fixtures is configured for wireless communications. The data communications interface communicates with at least one of the plurality of lighting fixtures. The at least one of the plurality of lighting fixtures communicates with at least a second of the plurality of lighting fixtures via wireless communications. The control module is configured to provide a control signal to the data communications interface for communicating to the at least one of the plurality of lighting fixtures and for at least one of turning on and turning off the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility. The control module is configured to determine the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of at least one of heat and sound within the facility. The control module is configured to compare the level of the at least one of heat and sound within the facility with at least one of a heat and sound threshold associated with human occupation. The control module is further configured to quantify a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm. The control module is further configured to quantify the reduction in power by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm.

Other principal features and advantages of the invention will become apparent to those skilled in the art upon review of the following drawings, the detailed description, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the invention will hereafter be described with reference to the accompanying drawings, wherein like numerals denote like elements.

FIG. 1 depicts a schematic diagram of a system for monitoring, controlling and metering a plurality of HIF lighting fixtures in a facility in accordance with an exemplary embodiment.

FIG. 2 depicts a schematic diagram of a system for monitoring, controlling and metering a plurality of HIF lighting fixtures in a facility in accordance with another exemplary embodiment.

FIG. 3 depicts a schematic diagram of a system for monitoring, controlling and metering a plurality of HIF lighting fixtures in a facility in accordance with a further exemplary embodiment.

FIG. 4 depicts a block diagram of a method for monitoring, controlling and metering a plurality of HIF lighting fixtures in a facility in accordance with an exemplary embodiment.

FIG. 5 depicts a block diagram of a method for reducing electricity usage during peak demand periods in accordance with an exemplary embodiment.

FIG. 6 depicts a block diagram of a system for controlling lighting in a facility in accordance with an exemplary embodiment.

FIG. 7 depicts an exemplary graphical user interface that could be displayed on a display in accordance with an exemplary embodiment.

FIG. 8A depicts a block diagram of a system for controlling lighting in accordance with an exemplary embodiment.

FIG. 8B depicts a block diagram of a system for controlling lighting in accordance with another exemplary embodiment.

FIG. 9 depicts a flow diagram of a process for controlling lighting devices in accordance with an exemplary embodiment.

DETAILED DESCRIPTION

With reference to FIG. 1, a block diagram of an intelligent system 10 for monitoring, controlling and metering electrically-operated (e.g. electricity consuming) equipment shown as HIF lighting fixtures in a facility 12 is shown in accordance with an exemplary embodiment. The system 10 is shown to include a master controller 20, a master transceiver 40, a sensor 50, a group of HIF lighting fixtures 60, and a local transceiver unit 70 associated with the HIF lighting fixtures 60. Although only one sensor is shown to be associated with the HIF lighting fixtures in one environment (or interior space), it is understood that any number of sensors (operable to monitor any of a wide variety of parameters in one or more interior spaces within the facility) may be provided for operating the HIF lighting fixtures in one or more designated spaces or environments within the facility.

The master controller 20 is programmable with a desired usage pattern (e.g. control schedule, operation schedule, time schedule, etc.) for the applicable electrically-operated equipment in the facility and automatically generates a time-based control signal 42 to be sent from the master transceiver 40 to the local transceiver unit(s) 70 associated with each of the applicable HIF lighting fixtures 60 to control operation of the fixtures according to the usage pattern (e.g. turn on at a specified time, turn off at a specified time, etc.). The master controller 20 is also operable to automatically “learn” a new usage pattern based on an on-going pattern of demand-based control signals 44 from the master controller 20, based on demand signals received from the sensor 50. The master controller may also be manually programmed with new (or modified) usage patterns, as may be determined by a manager of the facility (or other appropriate entity).

In order to provide for intelligent control of the HIF lighting equipment, the master controller 20 is also operable to reduce power consumption during peak and off-peak power demand periods by monitoring the need for operation (e.g. “demand”) of the HIF lighting fixtures (as indicated by appropriate signal(s) received from the sensors) and generating a demand-based control signal 44 that is sent from the master transceiver 40 to the local transceiver units 70 for operation of the HIF lighting fixtures 60 in a manner intended to reduce power consumption during the peak and/or off-peak demand periods (e.g. turn-off, turn-on, etc.).

To further provide for intelligent control of the HIF lighting equipment, the master controller 20 may also receive instructions from an external entity (e.g. shown for example as a power provider 14, etc.) to shape or manage peak loading by “trimming” or “shedding” load (e.g. during peak demand periods, or during other periods when power supply capacity is limited, such as when a base load generating plant is taken off-line, etc.) by generating an override control signal 46 to be sent from the master transceiver 40 to the local transceiver units 70 for overriding the time-based control signals 42 and/or the demand-based control signals 44 and turning certain designated HIF lighting fixtures off. According to one embodiment, the override control signal 46 may be selectively transmitted to the fixtures on an as-needed or case-by-case basis to permit selective/manual management of loading and capacity of a power grid during peak demand periods. According to another embodiment, the override control signal 46 may be automatically transmitted to the fixtures upon the occurrence of certain predetermined criteria, such as a reduction in available capacity to a certain level or percentage, or a rate of reduction in available capacity that exceeds a certain setpoint, etc. The criteria for initiation of the override control signal 46 are intended to be established in advance between the power provider and the facility manager and implemented according to a predetermined arrangement. According to such an arrangement, certain designated HIF lighting fixtures may be preprogrammed into the master controller 20 by the facility manager (or others) according to the criticality of operation of the HIF lighting fixtures, and may be provided in “stages” or the like according to an amount of demand reduction that is desired. The local transceiver units actuate the HIF lighting fixtures according to the control signal(s) (i.e. turn-on, turn-off, etc.) and then send a return signal corresponding to the particular HIF lighting fixture to respond to the master controller indicating that the action has been accomplished and to provide a status of each HIF lighting fixture (e.g. on, off, etc.). The term “power provider” as used herein is intended to include (as applicable) any supplier, distributor or aggregator of electrical power to a user, including but not limited to an electric power aggregator, a utility, a utility generator, an electric power generator, an electric power distributor, etc.

The master controller 20 receives the return signal 72 from the local transceiver unit(s) 70 and is intended to provide “intelligent metering” of each of the HIF lighting fixtures 60 in the facility 12 by logging (e.g. tracking, recording, trending, etc.) the power reduction achieved by reducing operation of the HIF lighting fixtures 60 (e.g. during peak demand periods relative to the facility's usage pattern as accomplished by monitoring within the facility 10, or during any reduced capacity period as requested/instructed by the power provider, etc.) and provides data for each HIF lighting fixture to a user (e.g. facility manager, power provider, third-party power reduction service provider, etc.) to confirm the action requested by an override control signal has been accomplished for shaping or managing peak demand, and to quantify the power reduction and/or the corresponding economic savings. The data is provided in a cumulative format to provide a total savings over a predetermined period of time. The data is also provided instantaneously for confirmation of the status of each of the HIF lighting fixtures (e.g. on, off, etc.) by the user.

The master controller 20 may be a custom device that is programmed with the desired algorithms and functionality to monitor and control operation of, and to provide intelligent metering of, the HIF lighting fixtures. Alternatively, the master controller may be a commercially available product.

The master controller 20 is operable in a “normal” mode and an “override” mode for control of the HIF lighting fixtures 60. For “normal” modes of control, the master controller 20 operates according to both a time-based control scheme and a demand-based control scheme to reduce electricity usage during both peak and off-peak demand periods. In the time-based control scheme, the master controller 20 controls operation of the HIF lighting fixtures 60 according to the usage pattern (i.e. on a time-based schedule, etc.) to operate (e.g. energize/de-energize, turn on/off, etc.) the HIF lighting fixtures 60. The usage pattern provides a “baseline” operation control scheme for the HIF lighting fixtures 60 that is time or schedule based, and may be regularly updated (manually or automatically) to reflect changing usage patterns for the HIF lighting fixtures 60. For example, the time based control scheme may reduce off-peak demand by reducing the scope/duration of the usage pattern and conserve energy during evening and nighttime hours.

In the demand-based control scheme, the master controller 20 monitors and controls the designated HIF lighting fixtures 60 within the facility 12 based on signals received from various sensors 50. Each sensor is operable to monitor any one or more of a wide variety of parameters associated within a predefined interior space 16 (e.g. designated environment, room, etc.) within the facility 12, such as but not limited to, ambient light level, motion, temperature, sound, etc., and provide a sensor output signal 52 associated with the parameter to the master controller 20. Alternatively, a switch (e.g. pushbutton, etc.) may be provided so that a user can manually initiate an output signal. The sensor output signal 52 may be transmitted using a network that is wired, or may be wireless. According to one embodiment as shown for example in FIG. 2, the sensor 50 is operable to monitor ambient light level (e.g. through windows, light-pipes, skylights, etc.) and/or motion within the interior space 16 and to provide a sensor output signal 52 to the master controller 20 via a hardwire network 54. The master controller 20 processes the sensor output signal(s) 52 according to a preprogrammed algorithm having logic steps that determine the need (e.g. demand) for operation of the HIF lighting fixtures 60, based on the facility usage pattern and the parameters monitored by the sensor(s) 50, and defines or generates a demand-based control signal 44 to be transmitted from the master transceiver 40 to the appropriate local transceiver unit(s) 70 to control operation of the HIF lighting fixtures 60. For example, the demand based control scheme may reduce peak demand or off-peak demand depending on when the HIF fixtures are turned-off (e.g. by turning-off the HIF fixtures due to ambient light level during daytime hours, or by turning-off the HIF fixtures due to absence of motion during evening/nighttime hours, etc.).

According to the embodiment illustrated in FIGS. 1-3, a local transceiver unit 70 is provided on each of the HIF lighting fixtures 60 and intended to be controlled by the master controller 20, and each local transceiver unit 70 includes a unique address corresponding to a particular HIF lighting fixture 60 that is recognized by the master controller 20. According to one embodiment, each local transceiver unit 70 includes multiple switches (e.g. relays, etc.) for operation of the HIF lighting fixtures. For example, in HIF lighting fixtures having two ballasts, one local transceiver unit 70 has two switches and is associated with each fixture, and each ballast (with its associated lamps on the fixture) is independently controlled by one of the switches in the transceiver unit 70. Each local transceiver unit 70 may be coupled to its associated HIF lighting fixture 60 in any one of a variety of manners. For example, the local transceiver unit may be locally installed adjacent to the HIF lighting fixture and hard-wired (e.g. for retro-fit applications, etc.). According to another example, the local transceiver unit may be configured for plug-in connection to the HIF lighting fixtures (e.g. in a “plug-and-play” manner, etc.). According to a further example, the local transceiver unit may be integrally formed with (or otherwise integrally provided as a part or component of) the HIF lighting fixtures.

According to one embodiment as shown for example in FIG. 2-3, the HIF lighting fixtures 60 form an artificial lighting system for interior space 16 in the facility 12. According to an alternative embodiment, the electrical equipment may be any of a wide variety of energy consuming devices or equipment, such as appliances, motors that operate building service loads or run manufacturing process equipment, etc.).

As illustrated in FIGS. 2-3, the master controller 20 receives the sensor output signal 52 representative of motion (e.g. by occupants within the facility, operation of manufacturing equipment, etc.) and/or ambient light level (e.g. artificial light from fixtures that are “on”, natural light such as sunlight through windows, skylights, light pipes, etc.) from the sensor(s) 50. The master controller 20 also receives a response signal 72 from the local transceiver unit 70 associated with each HIF lighting fixtures 60 indicating whether the fixture 60 (or it's ballasts) is “on” or “off.” The master controller 20 processes the sensor output signal 52 from the sensor 50 and the response signal 72 from local transceiver units 70 according to a preprogrammed method or algorithm and determines whether a demand for lighting exists within the interior space 16, and then provides an appropriate demand-based control signal(s) 44 to the local transceiver unit(s) 70 for operation of the HIF lighting fixtures 60.

For example, the method for determination of artificial lighting demand in the interior space 16 may include the steps of (a) comparing the ambient light level to a predetermined setpoint, below which artificial lighting is desired and above which artificial lighting is not desired, (b) determining whether motion within the environment is present. If the light level is below the setpoint, and the HIF lighting fixtures 60 are “off,” and motion is detected, then the master controller 20 generates a demand-based control signal 44 that is transmitted from the master transceiver 40 to the appropriate local transceiver units 70 to turn HIF lighting fixtures 60 (e.g. one or both ballasts) “on”. The local transceiver units 70 receive the demand-based control signal 44 and operate to turn their respective HIF lighting fixtures 60 “on” and then send a respond signal 72 to the master controller 20 to provide the status of each HIF lighting fixture 60 (e.g. “on”). Similarly, if the ambient light level within the environment is above the setpoint and the HIF lighting fixtures 60 are “on”, regardless whether or not motion is detected, then the master controller 20 provides a demand-based control signal 44 to the local transceiver units 70 to turn fixtures 60 “off”. The master controller 20 may delay the control signal for a suitable time delay period (e.g. 5 minutes, 15 minutes, etc.) to provide increased assurance that no activity in the environment is present (e.g. to avoid a “strobe” or “disco” like effect resulting from turning the fixtures on and off in response to intermittently changing light levels—such as intermittent cloud cover, etc.). The master controller 20 may also be programmed to provide a time delay before such fixtures may be turned back on again (e.g. to minimize power consumption associated with too-frequently cycling the equipment or fixtures between and on and off condition, and/or to minimize detrimental effects on the equipment such as reducing lamp life, overheating motors, etc.). The local transceiver units 70 receive the demand-based control signal 44 and operate (e.g. by actuating one or more switches or relays) to turn their respective HIF lighting fixtures 60 “off” and provide a response signal 72 to the master controller 20 indicating the status (e.g. “on” or “off”) of the fixture 60, thus providing “metering” of the HIF lighting at a “fixture level.”

The master controller 20 “meters” the amount of the power reduction achieved (during peak demand and off-peak demand periods) by logging the response signal 72 of the HIF lighting fixtures' status received from the local transceiver units 70 and providing cumulative data on the time, duration and status of the HIF lighting fixtures 60. The data may be provided on a predetermined frequency (e.g. monthly or keyed on some other criteria, such as a billing period, etc.).

According to an alternative embodiment shown in FIG. 3, the sensor 50 for a particular environment may interface directly with one of the local transceiver units 70 for the HIF lighting fixtures 60 associated with the interior space 16. The local transceiver unit 70 then wirelessly transmits the sensor output signal 52 from the sensor(s) 50 to the master controller 20. For example, a sensor may include a modular quick-connect that plugs into a local transceiver unit, or may be hard-wired to the local transceiver unit, or may transmit the sensor signal wirelessly to the local transceiver unit. In either case, the local transceiver unit “relays” the sensor signal to the master controller.

The master controller also operates to accomplish peak demand energy reduction by receiving override control signals (e.g. to turn-off certain fixtures according to a predetermined scheme) from the power provider (in response to peak demand management or shaping objectives/criteria) and transmitting a signal to appropriate local transceivers to “override” any existing or previous signal and turn-off the associated HIF fixture (or a ballast of the fixture). For such “override” modes of operation where the master controller 20 provides a signal that overrides the “normal” mode of monitoring and controlling operation of the HIF lighting fixtures 60, such as when override control instructions are received from a user (e.g. power provider 14, a facility manager, or the like to shed or trim loads to manage electricity usage during peak demand periods, etc.), the master controller 20 receives input signals or instructions 17 (manually or automatically) to control operation of the HIF lighting fixtures 60. For example, during periods when available electric capacity is limited and a power provider 14 (e.g. an independent system operator, etc.) desires to selectively reduce system-wide loading to maintain stability of a regional electric grid, the power provider may manually send instructions 17 to the master controller 20 to reduce power consumption by a specified amount (e.g. percent load, specific number of kilowatts, etc.). According to another embodiment for managing electricity usage during peak demand periods, the instructions 17 may be provided automatically (e.g. by an automatically initiated signal sent to the master controller) in response to certain predetermined conditions, occurrences, or criteria (e.g. existing demand is approaching (or has exceeded) a predetermined level such as a percentage of grid capacity, or a rate of increase of demand is approaching (or has exceeded) as a predetermined level, or a loss of certain generating capacity has occurred or is anticipated, etc.), and are received by the master controller 20 to implement the instructions and “override” existing equipment control status (if necessary). The master controller 20 processes the instructions 17 according to a preprogrammed algorithm that reflects the criteria established and agreed upon between the power provider and the facility manager for intervention (or interruption) by the power provider. According to another embodiment, the override control signal 46 may be manually initiated by the facility manager (e.g. by actuating an input interface (touch screen, pushbutton, etc.) at, or operably associated with, the master controller) to permit the facility manager to initiate action (unilaterally or in coordination with a power provider) to reduce peak demand.

According to one embodiment, the algorithm reads the desired load reduction instructed by the power provider 14 and identifies certain HIF lighting fixtures 60 to be turned-off according to a preprogrammed hierarchy of fixtures that are arranged generally from least-critical to most-critical for the operation or purpose of the facility 12, corresponding to the amount of load reduction requested by the power provider 14. The master controller 20 defines or provides an override signal 46 to be transmitted by the master transceiver 40 to the appropriate local transceiver units 70 to turn off the corresponding HIF lighting fixtures 60 identified by the master controller 20 to comply with the instructions 17. The local transceiver units 70 operate to turn the HIF lighting fixtures 60 off and then send a response signal 72 to the master controller 20 with the status of the HIF lighting fixtures 60 (i.e. “off”). The master controller 20 may process one or more iterations of load shedding control signals to local transceiver units 70 until the amount of load reduction requested by the power provider 14 has been achieved. The master controller 20 logs the status of the HIF lighting fixtures 60 and sends data 18 (e.g. “instantaneously” or otherwise within a certain desired time period) to the power provider 14 confirming the instructions and identifying the equipment status and the corresponding amount of power reduction (i.e. “instantaneous metering” or the like), where the dynamics of regional grid stability and control dictate a rapid instruction and response.

Upon restoration of the system condition (e.g. grid stability, desired capacity margins, etc.) the power provider 14 may then send instructions 17 to the master controller to resume a normal mode of operation for the HIF lighting fixtures 60 (as otherwise indicated by time-based or demand-based criteria). Alternatively, in the event that override operation was initiated within the facility (e.g. by a facility manager, etc.), the facility manager may provide instructions to the master controller (e.g. via an input interface on the master controller, etc). The master controller 20 then operates to restore such loads (if needed) according to the algorithm for the normal mode of operation, including such factors as the facility's usage pattern, the sensor signals, the existing status of the HIF lighting fixtures, etc., preferably by restoring the HIF lighting fixtures in order from most-critical to least-critical.

During any mode of operation, the master controller 20 monitors the status of the HIF lighting fixtures 60 and records the time (e.g. date and time) that the devices turn on and off, and determines the amount of time that the device was actually “off” during the normal “on” time of the facility's usage pattern and calculates the amount of peak demand electrical energy saved, based on pre-programmed data related to each fixture's electrical power consumption rating. The calculation of peak demand electrical energy saved may be conducted on a daily basis, or may be done on a less frequent and cumulative basis (e.g., weekly, monthly, etc.).

According to one embodiment, the master controller 20 also sends the data 18 representing the peak demand power reduction to the facility's power provider 14, so that an appropriate credit for reduction in peak demand power may be received by the facility owner (or its representative). The applicants believe that large-scale implementation of the intelligent monitoring, controlling and metering system and the “override” ability to shed a facility's loads when necessary in a predetermined manner could provide substantial reductions in peak power demand, and permit the power provider to better manage limited power resources during peak periods. Such peak demand reductions are intended to minimize the need for constructing new power generating plants, which could provide substantial economic savings/benefit. However, in order for demand-side users of the power to implement peak demand power consumption reduction measures such as intelligent monitoring and metering, business models typically require some type of incentive to be provided to the user. One possibility is that the power provider could provide certain on-going credits (e.g. discounts, rebates, refunds, etc.) corresponding to the peak demand power reduction achieved by the user, in order to provide incentive. The master controller is intended to allow demand-side users to intelligently manage their power usage and obtain corresponding credits, while permitting the supply-side power providers to obtain the benefits of a lower peak demand, by actively controlling operation of the electrically-operated equipment, and recording and storing the equipment's operating status data, and calculating the resulting reduction in peak power demand, and transmitting such data to the power provider.

Referring further to FIG. 2, the master controller 20 is described in further detail, according to an exemplary embodiment. Master controller 20 is shown to include a display 22, an input interface 24, an output interface 26, a memory 28, a processor 30, a normal mode equipment controller application 32, an override mode equipment control application 34, a power reduction metering application 36 and a usage pattern application 38. However, different and additional components may be incorporated into master controller. Display 22 presents information to a user of master controller 20 as known to those skilled in the art. For example, display 22 may be a thin film transistor display, a light emitting diode display, a liquid crystal display, or any of a variety of different displays known to those skilled in the art now or in the future.

Input interface 24 provides an interface for receiving information from the user for entry into master controller 20 as known to those skilled in the art. Input interface 24 may use various input technologies including, but not limited to, a keypad, a keyboard, a pen and touch screen, a mouse, a track ball, a touch screen, one or more buttons, a rotary dial, etc. to allow the user to enter information into master controller 20 or to make selections presented in a user interface displayed on display 22. Input interface 24 is also configured to receive signals from a power provider 14 (e.g. override instructions to reduce load, etc.). Input interface 24 is also configured to receive response signals 72 from the local transceiver units 70 representative of a status of their associated HIF lighting fixtures 60. Output interface 26 provides the control signals to the master transceiver 40, and sends metering data 18 to a user (e.g. transmits instantaneous monitoring and metering data to a power provider 14 in response to override instructions, or transmits power reduction metering data for a predetermined period of time to the power provider 14, etc.). According to other embodiments, the input interface 24 may provide both an input and an output interface. For example, a touch screen both allows user input and presents output to the user. Master controller 20 may have one or more input interfaces and/or output interfaces that use the same or a different technology.

Memory 28 is an electronic holding place or storage for information so that the information can be accessed by processor 30 as known to those skilled in the art. Master controller 20 may have one or more memories that use the same or a different memory technology. Memory technologies include, but are not limited to, any type of RAM, any type of ROM, any type of flash memory, etc. Master controller 20 also may have one or more drives that support the loading of a memory media such as a compact disk, digital video disk, or a flash stick.

Master transceiver 40 provides an interface for receiving and transmitting data between devices (e.g. master controller 50, sensors 50, local transceiver units 70, etc.) using various protocols, transmission technologies, and media as known to those skilled in the art. The communication interface may support communication using various transmission media that may be wired or wireless. Master controller 20 may include a plurality of communication interfaces that use the same or a different transmission and receiving technology.

Processor 30 executes instructions as known to those skilled in the art. The instructions may be carried out by a special purpose computer, logic circuits, or hardware circuits. Thus, processor 30 may be implemented in hardware, firmware, software, or any combination of these methods. The term “execution” is the process of running an application or the carrying out of the operation called for by an instruction or algorithm. The instructions or algorithm may be written using one or more programming language, scripting language, assembly language, etc. Processor 30 executes an instruction, meaning that it performs the operations called for by that instruction. Processor 30 operably couples with display 22, with input interface 24, with output interface 26, and with memory 28 to receive, to send, and to process information. Processor 30 may retrieve a set of instructions from a permanent memory device and copy the instructions in an executable form to a temporary memory device that is generally some form of RAM. Master controller 20 may include a plurality of processors that use the same or a different processing technology.

Normal mode equipment controller application 32 performs operations associated with managing electricity usage during peak demand and off-peak demand periods by controlling the operation of HIF lighting fixtures 60 in the facility 12 (such as a light level within the interior space 16). Control of the HIF lighting fixtures 60 may be determined according to a time-based control algorithm (e.g. based on a usage pattern) and a demand-based control algorithm (e.g. based on input signals from sensor(s) that monitor applicable parameters or conditions such as light level and motion). The operations may be implemented using hardware, firmware, software, or any combination of these methods. With reference to the exemplary embodiment of FIG. 2, normal mode equipment controller application 32 is implemented in software stored in memory 28 and accessible by processor 30 for execution of the instructions that embody the operations of normal mode equipment controller application 32. Normal mode equipment controller application 32 may be written using one or more programming languages, assembly languages, scripting languages, etc.

Override mode equipment controller application 34 performs operations associated with reducing electricity usage during peak demand periods by overriding the normal operation of HIF lighting fixtures 60 in the facility 12 (such as reducing or shedding loads in the facility 12 in response to instructions 17 generated automatically or manually and received from a power provider 14, or the facility manager, etc.). The operations may be implemented using hardware, firmware, software, or any combination of these methods. With reference to the exemplary embodiment of FIG. 2, override mode equipment controller application 34 is implemented in software stored in memory 28 and accessible by processor 30 for execution of the instructions that embody the operations of override mode equipment controller application 34. Override mode equipment controller application 34 may be written using one or more programming languages, assembly languages, scripting languages, etc.

Power reduction metering application 36 performs operations associated with calculating the amount of electric power saved during peak and off-peak demand periods by controlling the usage of the HIF lighting fixtures 60 within the facility 12. The operations may be implemented using hardware, firmware, software, or any combination of these methods. With reference to the exemplary embodiment of FIG. 2, power reduction metering application 36 is implemented in software stored in memory 28 and accessible by processor 30 for execution of the instructions that embody the operations of power reduction metering application 36. Power reduction metering application 36 may be written using one or more programming languages, assembly languages, scripting languages, etc.

Facility usage pattern application 38 performs operations associated with establishing or providing the normal usage pattern (e.g. time schedule and status such as “on” or “off”) of the HIF lighting fixtures 60 in the facility 12, for use in calculating the amount of electric power saved during peak and off-peak demand periods by controlling the usage of the HIF lighting fixtures 60 within the facility 12. According to one embodiment, the facility usage pattern application 38 also includes power consumption ratings for the HIF lighting fixtures 60 controlled by the master controller 20. The operations may be implemented using hardware, firmware, software, or any combination of these methods. With reference to the exemplary embodiment of FIG. 2, facility usage pattern application 38 is implemented in software stored in memory 28 and accessible by processor 30 for execution of the instructions that embody the operations of peak demand power saved application 38. Peak demand power saved application 38 may be written using one or more programming languages, assembly languages, scripting languages, etc.

Referring further to FIG. 2, the HIF lighting fixtures 60 may be the same or may include variations of HIF lighting devices. Associated with each of the plurality of HIF lighting fixtures 62 is a local transceiver 70 having a unique address recognized by the master controller 20, and which receives and responds to a control signal (42, 44, 46) from master transceiver 40. The control signal (42, 44, 46) may include a lighting indicator specific to each of the plurality of HIF lighting fixtures 60 or may include the same lighting indicator for each of the plurality of HIF lighting fixtures 60. The lighting indicator may indicate on/off or may indicate a lighting level (e.g. turn one or both ballasts of a fluorescent lighting fixture on or off).

According to one embodiment, the local transceiver units 70 are capable of plugging into the lighting fixtures (or other electrically operated equipment provided by any of a wide variety of manufacturers) without additional wiring and can communicate (e.g. receive and respond) wirelessly with the master controller 20 using radio frequency (e.g. 915 MHz). Each local transceiver unit is assigned a unique address, so that each fixture is identifiable to (and controllable by) the master controller 20.

According to one embodiment, master transceiver 40 transmits control signal 42, 44, 46 using a radio frequency (such as 915 MHz) to the local transceiver units 70 of the interior space 16 that are within an effective range R1 defined based on the characteristics of the transmitter as known to those skilled in the art. However any of a wide variety of operating frequencies, modulation schemes, and transmission power levels can be used. For example, frequencies in the range of 27-930 MHz, and particularly within about 5% of 315, 434, 868, and/or 915 MHz may be used. Additionally, other frequencies such as 2.4 gigahertz may be used. Master transceiver 40 and local transceiver units 70 may be designed to qualify as unlicensed radio frequency devices under the Federal Communications Commission rules found in 47 C.F.R. §15. Master controller 20 is configured to encode a particular transceiver address in the control signal 42, 44, 46. Each local transceiver unit 70 is configured to respond only to control signals 42, 44, 46 encoded with its unique address. The HIF lighting fixture 60 associated with each local transceiver unit 70 can be turned on or off (or dimmed by de-energizing only one ballast) based on the control signal 42, 44, 46 received from the master transceiver 40. The address information may be encoded in the control signal using a variety of methods as known to those skilled in the art.

Referring further to FIG. 2, the master controller 20 can control the HIF lighting fixtures 60 located throughout the facility 12, by using one or more of the local transceiver units 70 as “repeaters” (shown as a repeater 74) to overcome range limitations due to the distance of the desired equipment from the master transceiver 40. For example, master transceiver 40 transmits a control signal 42, 44, 46 within a first range R1 for operation of fixtures 60 that are within range R1. A local transceiver unit 70 positioned within effective range R1 is designated (i.e. preprogrammed) to also operate as a repeater 74 by receiving the signal 42, 44, 46 from master transceiver 40 and retransmitting the control signal 42, 44, 46 using a radio frequency (e.g. 915 MHz) to any local transceiver units 70 within a repeater effective range R2. Using the local transceiver unit 70 as a repeater 74, the group of equipment 60 (shown for example as light fixtures 62) positioned outside effective range R1 (and within the effective range R2) can be controlled. Although only one repeater has been shown, multiple repeaters may be provided to permit control of a wide variety of electrically operated equipment located in various interior spaces throughout the facility.

Referring to FIG. 4, the method of monitoring, controlling and metering the HIF lighting fixtures in the facility is shown according to one embodiment to include the following steps (among possible other steps):

(a) establishing a usage pattern that defines a time-based control scheme for operation of designated HIF lighting fixtures within an environment of a facility,

(b) providing a time-based control signal to the HIF lighting fixtures to operate according to the time-based control scheme,

(c) modifying the time-based control scheme by monitoring a signal representative of one or more parameter in the environment and providing a demand-based control signal to one or more of the HIF lighting fixtures,

(d) receiving override instructions from a power provider to reduce electrical loading at the facility,

(e) providing an override control signal to one or more of the HIF lighting fixtures to accomplish the override instructions,

(f) receiving a response signal representative of a status of each of the HIF lighting fixtures in response to the control signals,

(g) sending a confirmation signal to the power provider in response to the override instructions, the confirmation signal including data representative of the identity and status of the HIF lighting fixtures that received the override control signal,

(h) logging the status, time and duration of operation (or non-operation) of each of the HIF lighting fixtures,

(i) quantifying a reduction in the power usage achieved by operating the HIF lighting fixtures according to the control signals, and

(j) sending a report containing data representative of the reduction in power usage over a predetermined time period to a power provider.

However, any one or more of a variety of other steps may be included, in any particular order to accomplish the method of monitoring, controlling and metering operation of the HIF lighting fixtures in the facility.

Referring to FIG. 5, the method of reducing electricity usage during peak demand periods by monitoring, controlling and metering the HIF lighting fixtures in the facility is shown according to one embodiment to include the following steps (among possible other steps):

(a) establishing a set of predetermined load reduction criteria that are representative of a need or desire by a power provider to reduce loading on an electricity supply grid during peak demand periods; the criteria may include a level or amount of load/demand on the grid, or a rate of increase in load/demand on the grid, or an actual or anticipated reduction in electricity supply to the grid, or a level or amount of capacity available on the grid, or a rate of decrease in the capacity available on the grid, where capacity is generally understood to be the difference between the available supply of electricity to the grid and the demand (i.e. load, etc.) on the grid (e.g. by users connected to the grid, etc.),

(b) establishing an agreement with a facility manager to facilitate the power provider's ability to manage the peak demand on the grid and intervene by interrupting the operation of certain HIF lighting equipment in the facility by sending instructions (manually or automatically) to a master controller in the facility; the instructions may designate specific equipment to be turned-off, or may specify an amount of electricity usage reduction to be achieved at the facility; the instructions may be initiated manually on an as-needed basis, or the may be initiated automatically in response to the occurrence of one or more of the predetermined load reduction criteria; where the instructions may identify specific HIF lighting equipment to be turned-off (e.g. according to a unique address for a local transceiver associated with the specific HIF lighting equipment), or specify an amount of load reduction requested by the power provider,

(c) establishing a schedule or listing of HIF lighting equipment in the facility to be turned-off in response to the instructions; the listing of equipment may include individual fixtures, or independent ballasts within a fixture, identified by a unique address recognized by the master controller; the fixtures may be groups of fixtures based on location or criticality to operation of the facility; the groups of fixtures may be specified in a cascading hierarchy of groups that are turned-off sequentially, or simultaneously, depending on an amount of electricity usage reduction, or the specific fixtures/ballasts, identified by the instructions;

(d) configuring the master controller (or an associated device) to send an override control signal to each of the designated HIF lighting devices; where the master controller may communicate with a master transceiver that communicates with a local transceiver associated with each lighting device (or a designated group of lighting devices to be operated collectively as a single unit),

(e) monitoring a status of the capacity of, or demand on, an electricity supply grid or network,

(f) sending an override control signal in response to the instructions received upon the occurrence of any one or more of the predetermined load reduction criteria;

(g) turning-off certain HIF lighting equipment in response to the override control signal;

(h) sending a response signal from the local transceivers associated with the HIF lighting equipment confirming that the fixtures are “off”;

(i) quantifying (i.e. metering, etc.) an amount of electricity usage reduction achieved during a peak demand period by turning-off the HIF lighting equipment in response to the instructions from the power provider.

According to any exemplary embodiment, a system and method are provided for reducing electricity usage during peak and off-peak demand periods through intelligent monitoring, control and metering of HIF lighting fixtures within a facility. The system includes a master controller, a master transceiver, one or more sensors, and a local transceiver unit uniquely identifiable to the master controller for each of the HIF lighting fixtures in the facility to be controlled. The sensor(s) monitor parameters within the facility and provide sensor signal(s) representative of the parameters to the master controller. During a normal mode of operation, the master controller processes the sensor signals according to preprogrammed algorithms and define or generate signals that are transmitted from the master transceiver to the appropriate local transceiver unit(s) to control operation of the HIF lighting fixtures. The local transceiver units provide a response signal to the master controller indicating the status of the associated HIF lighting fixtures for logging and tracking by the master controller. The master controller provides power reduction metering data to a user for quantifying the power saved and the economic benefit resulting from the power saved. During an override mode of operation, an outside user (e.g. power provider, facility manager, etc.) may manage the peak demand on the electric grid by providing instructions (manually or automatically) to reduce or shed load at the facility. The instructions may be generic (e.g. reduce power by a certain amount or percentage) or the instructions may be directed to certain identified equipment. The master controller processes the instructions according to preprogrammed algorithms and defines or generates signals that override previous control signals and are transmitted from the master transceiver to the appropriate local transceiver unit(s) to provide override control operation of the HIF lighting fixtures. The local transceiver units provide a response signal to the master controller indicating the status of the associated HIF lighting fixtures for logging and tracking by the master controller. The master controller provides instantaneous metering data to the power provider to confirm implementation of the instructions and identify a corresponding economic benefit resulting from the power saved. According to alternative embodiments, the system and method described herein may be adapted for use with other types of electrically operated equipment within the facility, such as equipment related to manufacturing processes, building support and services, and the like.

Accordingly, the intelligent monitoring, controlling and metering of the HIF lighting equipment in a facility is provided by the master controller and includes preprogrammed instructions, algorithms, data and other information that permits the HIF lighting equipment to be controlled (e.g. turned-off) in response to commands from an external source (e.g. a power provider), or an internal source (e.g. a facility manager), or in response to signals received from suitable sensors, to provide optimum operation of the HIF lighting equipment in coordination with peak-demand conditions, and to reduce overall energy usage and impact on the environment, and to optimize performance and life of the HIF lighting equipment and reduce maintenance and costs associated with the lighting equipment.

User Driven Configuration and Control of Lighting Systems

Referring now to FIG. 6, a block diagram of a system 600 for controlling lighting in a facility is shown, according to an exemplary embodiment. System 600 is shown to include master controller 602, which may be configured to be the same as master controller 20 shown in FIGS. 1-3 or which may be configured differently. Master controller 602 is shown in communication with a plurality of lighting fixture groups 604, 606; each group having a plurality of lighting fixtures. Master controller 602 is shown to include a data communications interface 608 for conducting the communications with the plurality of lighting fixtures.

Master controller 602 is further shown to include a control module 610. Control module 610 is configured to provide a control signal to data communications interface 608 (directly or indirectly). Control module 610 includes a processor 612 and memory 614 (which may generally be configured similarly to the processor and memory described above with reference to FIGS. 2 and 3). According to an exemplary embodiment, memory 614 is a non-volatile memory device storing at least computer code for operating master controller 602 and for the completion of one or more control algorithms relating to the lighting fixtures variously in communication with data communications interface 608. According to an exemplary embodiment, processor 612 is configured to execute the computer code stored in memory 614 and/or to otherwise facilitate the activities of master controller 602. The control signal provided to data communications interface 608 from control module 610 may be configured (e.g., formatted, modulated, etc.) to turn off (or on) one or more of the plurality of lighting fixtures. The control signal can be generated and sent from the control module according to a control algorithm. The control algorithm can be configured to generate the control signal based on at least one of a time of day and/or a sensed condition relating to the use of the facility. The control module can further be configured to quantify a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm. This quantification can be conducted according to any of the activities described above including, but not limited to, aggregating power readings from the lighting fixtures, aggregating lighting fixture time on and/or off during the day (the times on and/or off maintained by the lighting fixtures and/or the control module), considering the rate of energy consumed, characteristics of installed equipment (e.g., information that twelve lighting fixtures will be on for one hour at one hundred watt hours), and aggregating power measurements (e.g., current, voltage, power factor, etc.). For facilitating the quantification activity, memory 614 may store historical power usage information and/or power cost information for the lighting fixtures. Memory device 614, and/or another memory device which may be local or remote to control module 610 (e.g., a networked storage device, a hard drive, flash memory, etc.), may also store any number of other temporary, intermediate term, or long term data sets. For example, memory device 614 may store measurements of energy, schedule information, system/device configuration profiles, user profiles, light on/off records, and/or any other data. According to an exemplary embodiment, emissions profiles for individual devices or device types of the system are stored in memory 614 and used to calculate emission costs/savings based on behavioral data experienced by the system (e.g., off/on data). Resource (e.g., power) cost information may also be stored, updated, and/or maintained in memory based on manually entered costs or costs obtained from a remote system. This cost information can be used by the control algorithms and/or viewed by the user to control costs actually incurred. For example, if the user (or the algorithm) sees that the cost of power has increased by five percent, the user (or the algorithm) can take configuration steps to offset some or all of the increased costs (e.g., by configuring the lighting fixtures to power-down earlier if occupancy is no longer detected in a space).

When the control algorithm of control module 610 is based on a sensed condition relating to the use of the facility, master controller 602 receives information regarding the sensed condition from data communications interface 608 and/or sensor interface 616. According to an embodiment where data communications interface 608 receives the sensor information, any number of different sensing devices can be used to transmit the sensor information to data communications interface 608. For example, one or more of the lighting fixtures can include or be electrically coupled to a sensor. As shown in FIG. 6, first lighting fixture 618 is coupled to master transceiver 620 which is coupled to or includes sensor 622; second lighting fixture 624 is coupled to plug-in transceiver 626 which is coupled to or includes sensor 628. Group B lighting fixtures 606 can also include sensing devices. Sensors 630 not directly coupled to or in communication with the lighting fixtures can communicate directly with master controller 602 via sensor interface 616. Sensor interface 616 can be any type of wired or wireless interface (e.g., 915 Mhz, 315 Mhz, WiMesh, ZigBee, WiFi, WiMax, Ethernet, BACnet, wireless USB, Bluetooth, etc.). Data communications interface 608 can be of the same or a different technology and configuration than sensor interface 616. The sensor information or condition sensed by sensors 630, 622, 628 can include motion, ambient light levels, absolute light levels, heat, carbon dioxide, capacitance, or any other information or condition that can be used to sense a condition relevant to lighting (e.g., occupancy information, lighting information, etc.).

As shown in FIG. 6, one or more of the lighting fixtures in communication (e.g., transmitting, receiving, etc.) with master controller 602 includes a transceiver (e.g., transceiver 620, 626). The transceiver can be supplied with the lighting fixture or retrofit to the lighting fixture. For example, at least one of the plurality of lighting fixtures may include a transceiver which has been retrofit to the lighting fixture by placement in series (e.g., via a female plug-in interface and a male plug) with the power input for the lighting fixture. In addition to transceivers, each lighting fixture can also include a logic circuit configured to report a condition of the lighting fixture or its individual ballasts back to control module 610 via wireless communications. The conditions reported back to control module 610 can include, for example: (a) a state change from ‘on’ to ‘off’ or from ‘off’ to ‘on’, (b) a total of time in the ‘on’ state or the ‘off’ state, (c) a log of lighting state changes including a time the state change occurred, and the like. The logic circuit and/or a logic circuit of the transceiver can also gather measurements of actual energy used (e.g., current used, voltage used, power factor used) or another operational characteristics of the device by which energy usage can be derived and report the actual energy usage or the characteristics back to controller 602 via wireless communications. For example, a transceiver associated with a pumping system might measure pressure and report pressure back to controller 602. A pressure-to-energy model in controller 602 for the pumping system can be used to convert these received measurements to energy or emissions costs/savings.

The conditions reported to control module 610 from the devices can be communicated upon receipt of a query signal sent from control module 610 via data communications interface 608. In other embodiments, lighting fixtures 604, 606 only report conditions back to control module 610 when their state changes. In yet other embodiments, lighting fixtures 604, 606 self-report back to control module 610 on a regular (or irregular) basis (e.g., after a predetermined period of time, at predetermined times, etc.). The signals sent between data communications interface 608 and the transceivers can be modulated analog signals, digital signals, or any other appropriate wireless data communications signals.

According to an exemplary embodiment, using the state data provided by the lighting fixtures, control module 610 can also include circuitry and/or computer code for providing a diagnostics tool that determines maintenance actions to be completed. For example, if control module 610 sends a control signal to a lighting fixture and the lighting fixture does not appropriately respond (e.g., via a timeout, a communication failure, or by simply not responding properly (by not responding with the correct lighting state), etc.), the diagnostics tool might alert a system manager to this fact (e.g., via an alert provided to a graphical user interface, via an e-mail, text message, audible alert, and the like). Any number of other lighting-related activities may be provided by control module 610 or another system coupled to master controller 602 due to master controller 602's ability to serve as a data collection point for lighting-related information. For example, a bulb replacement or ballast replacement alert signal may be sent (e.g., to a graphical user interface, to an e-mail address, to a pager, to a text messaging device, etc.) after logging a predetermined cumulative “on” time or number of state changes. A diagnostics tool associated with control module 610 (e.g., working along with other software modules such as a web server) can allow remote access to diagnostics information. For example, a remote terminal may be able to log-into the control module to view device failure information, device alert information, device energy usage information, device communication success/failure information, network health information, and the like. A user investigating failure information via the remote terminal could then access configuration user interfaces provided at the remote location (e.g., web-based user interfaces served from controller 602 to the remote terminal) to repair or reconfigure the system, the network, the individual devices or otherwise address the problem. According to yet other exemplary embodiments, controller 602 may include a self-diagnostics module so that the system could attempt repair or reconfiguration measures without user input. For example, in the event of multiple network failures, controller 602 could command the transceivers of the system (e.g., lighting transceivers) to switch to a different RF channel. According to an exemplary embodiment, diagnostics and repair user interfaces are available via a user-friendly touch screen interface generated on a touch screen 632.

It should be noted that data communications interface 608 may also be configured to communicate with at least one other type of building component in addition to lighting fixtures. For example, data communications interface 608 may be configured to communicate with fans, air handling units, heating systems, manufacturing systems, research processing systems, and any other energy using systems/components. Control module 610 may selectively provide sensed condition based control and time of day based control to the other building component(s) via data communications interface 608. User interfaces provided by master controller 602 for lighting fixtures can also be appropriately provided for the other building component(s). It should further be appreciated that controller 602, according to various alternative embodiments, could be adapted to primarily serve the other types of building components rather than lighting (e.g. motors, machines, appliances, devices used in lean manufacturing processes, etc.). For example, controller 602 may be used to control motors used to operate conveyor devices and the like in logistics facilities, or ventilation equipment in livestock or agricultural facilities and the like. By way of further example, controller 602 may use an optical sensor to count a number of units (e.g., processed units, input units, output units, etc.) of a manufacturing process and to quantify power expenditure based on known or estimated power costs associated with a unit. Yet further, for example, controller 602 can be configured to provide user interfaces, execute control algorithms, and to control signals relating to any building system having devices that may be turned on/off and or varied to save power. For example, controller 602 may be configured to control a one or more variable speed pumps of an air compressor for maximum efficiency. A transceiver coupled to the pump (or a controller for the pump/compressor) may record data relating to the pump and send the data to controller 602 via the transceiver. The transmission of the data to controller 602 may be conducted by a network of similar or different transceivers coupled to devices for control/energy monitoring. In other words, transceivers coupled to devices may use a bi-directional “information highway” formed by similar transceivers (e.g., transceivers coupled to lighting fixtures) to propagate data and/or control information to/from the transceivers and the controller (e.g., controller 602).

Each lighting fixture may be associated with a unique identifier so that high resolution sensing and control options are available to master controller 602. For example, if each lighting fixture includes an occupancy sensor (e.g., sensors 622, 628), control logic of master controller 602 or a circuit local to the lighting fixtures can advantageously cause lighting to “follow” a human walking through a building (e.g., turning only those lights on that the human needs to see, saving power by keeping the other lights off). Further, a high resolution of lighting fixtures and individual control can provide varied power savings and/or brightness levels. For example, a user can select to have “every third light” turned on during a low-use period of the day or configure control module 610 or the local circuit of the lighting fixture to only turn those lights on in an area that are necessary to reach a threshold absolute brightness level (ambient light+lighting fixture light). A high resolution of lighting devices may also be configured to assist with access control/security features. For example, while lights may turn on for authorized users, the lights may not turn on for unauthorized users, making it difficult for unauthorized users to see and/or otherwise serving as an deterrent. To facilitate such activity, some of sensors 630 may be access card readers, biometrics devices, security keypads, or other security-related sensors or devices for evaluating whether access is permitted. Accordingly, some embodiments of controller 602 include a security module configured to store access control profiles that affect the operation of the control algorithms. The security module may also allow varying levels of control to the control algorithms and user interfaces provided by controller 602. For example, while all user might have “turn on/turn off” level access, only users with higher level access might be granted configuration level access, scheduling access, and the like.

Referring still to FIG. 6, master controller 602 is shown to include a touch screen 632 electrically coupled to control module 610, according to an exemplary embodiment. While touch screen 632 is illustrated as being integrated with master controller 602 (e.g., touch screen 632 and control module 610 share the same housing), according to other exemplary embodiments touch screen 632 can be remote from master controller 602/control module 610 and communicate with master controller 602/control module 610 via a wired or wireless communications link. Further, while touch screen 632 is illustrated in FIG. 6, it should be appreciated that any user interface having one or more user interface controls or elements could be configured to provide functionality similar to or the same as touch screen 632. For example, in place of (or in addition to) touch screen 632, a display screen with buttons separate from the display screen may be provided.

Touch screen 632, as illustrated in FIG. 6, is displaying a Lighting Fixtures Group A configuration menu via a graphical user interface 634. Graphical user interface 634 is shown to include an indicator of the current algorithm mode for Lighting Fixtures Group A as well as a number of user interface elements (e.g., buttons, “hot zones,” hyperlinks, etc.) 636-648 for controlling Group A lighting fixtures 604 or for configuring control module 610 for control of Group A lighting fixtures 604. User interface elements 636-648 include user interface element 636 and user interface element 638 for manually controlling lighting fixtures. As indicated by user interface elements 636, 638, manual control of lighting fixtures may override a previously set algorithm mode. Another algorithm mode selectable via exemplary graphical user interface 634 includes a “time of day” based lighting logic (available via user interface element 640). According to various exemplary embodiments, algorithm modes such as sensed condition-based logic, supply-based logic, or any other suitable lighting logic mode are available via graphical user interface 634.

Graphical user interface 634 is further shown to include user interface element 642 for setting a schedule for mode switching. With user interface element 642, for example, a user can schedule an “ambient lighting” mode to be active during day-light hours (so that, for example, the lighting fixtures only turn on if there is not enough ambient light in the room), an occupancy-based mode to be active during dawn and dusk hours, and a manual mode (with a default to off) to be active during nighttime hours. According to an exemplary embodiment, graphical user interface 634 allows a user to schedule/set any combination or permutation of algorithm conditions (e.g., motion, ambient lighting, timing) or states (e.g., override, timing, occupancy, sensed condition, etc.).

It should be noted that control module 610 could be configured to provide control signals to transceivers in system 600 based on internal demand-response type algorithms, external demand-response type algorithms, and/or any other type of algorithm. As described above, external demand-response type algorithms can control devices to save power based on commands and/or data received from sources external the system (e.g., a power plant). Internal demand-response type algorithms can monitor energy, device, and/or facility characteristics locally and make and execute control decisions relating to those characteristics.

Referring still to FIG. 6, graphical user interface 634 is shown to include a user interface element 644 titled “Change Group A Composition.” User interface element 644 can be used to receive input for changing the lighting fixtures associated with “Group A.” For example, by utilizing user interface element 644 (and other user interface elements that appear once element 644 is selected (e.g., clicked, touched, pressed), a user could remove the second lighting fixture from “Group A” and add one or more additional lighting fixtures to “Group A.” According to an exemplary embodiment, graphical user interface 634 is configured to provide a map (e.g., top-down floor plan view, bird's eye view, perspective view, etc.) of a facility area (e.g., zone, room, group of rooms, etc.) from which the user can select lighting fixtures or groups for control. For example, in one exemplary embodiment, the user can click on a plurality of lighting fixtures shown dispersed around a floor plan, select a user interface element labeled “Group,” and then assign a name to the group of selected lighting fixtures (e.g. “Library Fixtures”, etc.). Control module 610 can then store the user's selected grouping in memory, allow the user to select the grouping for configuration via the touch screen, and store algorithm settings for the grouping. By selecting user interface element 646, labeled “View Lighting Fixtures Group B Configuration Menu,” a user can command the controller to change from providing user interface elements for Group A to providing user interface elements for Group B. By selecting user interface element 648, a user can command the controller to provide a map of all lighting fixtures or groups in a facility or facility area. According to an exemplary embodiment, the Group A fixtures can be associated with a first color (e.g., blue) while the Group B fixtures are associated with a second color (e.g., green) allowing for easy viewing of the map and/or actual labeling of the fixtures.

Referring now to FIG. 7, an exemplary graphical user interface 700 that could be displayed on the touch screen of FIG. 6 or on another display communicably coupled to a master controller is illustrated, according to an exemplary embodiment. By way of an example in a facility having four zones, graphical user interface 700 is shown to include four configuration zones for Groups A, B, C, and D (zones 702-708). According to an exemplary embodiment, zones 702-708 correspond to areas or zones of a facility floor (e.g., zone 702 corresponds to lighting in a northwest area of the facility, zone 704 corresponds to lighting in a northeast area of the facility, zone 706 corresponds to a southwest area of the facility, and zone 708 corresponds to a southeast area of the facility, etc.). In such an exemplary embodiment, the graphical user interface shows a representation of a facility floor plan and the graphical user interface is configured to allow the user to divide the floor plan into one or more zones and to associate at least one of the lighting groups (e.g., A-D) with the one or more zones created by dividing the floor plan. It should be appreciated that many different graphics and/or ways for associating groups with physical facility locations could be implemented on graphical user interface 700. If a user clicks on zones 702-708, the system will generate a form or prompt for the user to change the configuration for the corresponding lighting fixture group. For example, if a user selects zone 702, the system will prompt the user for changes to the configuration corresponding to Group A. It should be appreciated that any number of configuration zones, lighting groups, lighting fixtures, floors, floor plans, facilities, or any other aspect shown in FIG. 7 may be varied according to other exemplary embodiments.

Each of zones 702-708 not only allow user selection for configuration, but, as shown, also display the current configuration. By the display of such information, users can advantageously see how a plurality of groups are configured by viewing a single screen. To change the configuration, for example, the user may only need to tap zone 702, tap the time period of 6:00 pm to 9:00 pm and then select a different mode (e.g., to change from an occupancy-based sensed condition during the three hour time period to an “ON” setting during the time period). According to an exemplary embodiment, the exemplary graphical user interface for configuration of Group A shown in FIG. 6 is displayed when a user clicks on zone 702. The text shown in zone 704 indicates that the Group B lights are in a fully automated algorithm mode whereby sensed conditions (e.g., motion, carbon dioxide, light sensors, etc.) plus logic determine when lighting is demanded in zone 704. Zone 704 further indicates that an override for the area is optional (e.g., users can flip a switch to turn the lights “off” or “on” and the fully automated mode will be overridden for one hour). Zone 706 indicates that the algorithm is set for manual mode and provides two user interface elements 710, 712 that can behave as traditional light switches for turning the lighting fixtures of Group C off and on. Zone 708 indicates that the algorithm is set for sensed condition based lighting logic and that the algorithm will turn the lights on when occupancy is detected in the room. Zone 708 is further illustrated to indicate a user-selected definition for “occupied”; when either sensed motion or sensed carbon dioxide levels (e.g., the carbon dioxide produced by breathing humans) in the facility area associated with Group D reach a threshold associated with human occupation, the lights will turn on. By selecting zone 708, user will view a prompt, generated by the master controller, to edit this configuration. Changes made via graphical user interface 700 are communicated to a memory device associated with the control model and/or are communicated out to the various lighting fixtures. It should be appreciated that other occupancy conditions may be used by other zones or that zone 708 may be reconfigured to a different set of conditions before zone 708 is considered “occupied.”

Referring still to FIG. 7, graphical user interface 700 is shown to include indicia 714 of a quantified reduction in power obtained by controlling the plurality of lighting fixtures of the facility according to “smart lighting” algorithms (e.g., the configurations of zones 702-708). While indicia 714 includes an indication of the kilowatt hours saved per date and dollars saved per date for the facility, it should be noted that any units of measurement, time period, and/or monetary unit may be displayed for any zone(s) in the facility. Further, it should be noted that indicia 714 may be icon-based, graph-based, color-coded, or otherwise used to communicate power savings information. Yet further, indicia 714 can be a user interface element (e.g., a button) that allows a user to view further and/or more detailed information regarding the quantification of power saved. For example, when indicia 714 is selected (e.g., clicked) the system may generate a tool (e.g., graphical user interface window) for verifying emission credits that utilizes the quantifications of power saved from the control module for conducting the verification. Graphical user interface 700 is further shown to include “view map” user interface element 716 and “change groupings” user interface element 718.

Referring now to FIG. 8A, a block diagram of a system 800 for controlling lighting is shown, according to an alternative exemplary embodiment. System 800 is shown to provide a configuration whereby a client device 802 provides the user interface (e.g., the graphical user interface shown in FIG. 7) for system 800. Client device 802 (e.g., a personal digital assistant (PDA), a mobile phone, a laptop, a workstation, a tablet, a remote control, a panel mounted on the wall, etc.) connects to master controller 804 via a wired or wireless connection to network 806 (WiFi network, Ethernet network, IP network, LAN, WAN, ZigBee network, Bluetooth Piconet, etc.). Master controller 804 may include the server (e.g., web server, web services module, server module) with which client device 802 communicates and provide the logic/control module for executing the lighting control algorithm of the system. As shown in FIG. 8A, master transceiver 808 (which may be incorporated with one or more lighting fixtures 810, 812 or may be stand-alone) is also shown connected to network 806 via a wired or wireless connection. According to an exemplary embodiment, master controller 804 can communicate to master transceiver 808 via the same protocol and/or network as that used to communicate to client device 802. Lighting fixtures 810, 812 can be wired to master transceiver 808 or master transceiver 808 can wirelessly relay control signals from master controller 804 to the appropriate lighting fixtures. According to various exemplary embodiments, master controller 804, master transceiver 808, and lighting fixtures 810, 812 can be of any network topology. For example, master transceiver 808 can broadcast control signals to all lighting fixtures in its vicinity in one embodiment, master transceiver 808 can be a node (e.g., a head node) in a mesh network in another embodiment, a center node in a star topology, a first node in a ring topology, etc.

FIG. 8B shows another exemplary embodiment of a system 850 for controlling lighting, according to an exemplary embodiment. In system 850, device 852 includes the master transceiver, the lighting control module for the system (e.g., the functionality of master controller 804 shown in FIG. 8A) and circuitry for a first lighting fixture. Lighting fixtures 854, client devices 856, 858, and network 860 are all shown as communicably connected to device 852 via wireless or wired connections. Additional client devices 864 (e.g., PDAs, mobile phones, control boxes) can connect to device 852 via network 860. Additional lighting fixtures 862 can also connect to device 852 to receive control signals via network 860. While only a few network topologies and/or configurations have been shown in the Figures, it should be appreciated that various devices and modules of the system can be integrated or separated (connected via wireless connections, wired connections, network connections, and the like) and the system will may still fall under the scope of the invention defined by the claims appended hereto and/or their equivalents.

Referring now to FIG. 9, a flow diagram of a process 900 for controlling lighting devices is shown, according to an exemplary embodiment. Process 900 is shown to include the step of recording and storing information regarding previous lighting fixture and/or power usage (step 902). The recording and storing step can include a variety of sub-steps including, but not limited to, gathering utility bills, measuring daily power consumption of the previous lighting over a period of time, averaging the previous consumption, measuring power use by a single lighting fixture, and calculating to determine the power used by all lighting fixtures, etc. The output from step 902 may be some record or value against which power use reductions can be quantified. Process 900 is further shown to include the step of providing and installing a plurality of new (or retrofit) lighting fixtures (step 904). The lighting fixtures can be lighting fixtures as described above or otherwise. According to an exemplary embodiment, the lighting fixtures include or are retrofit with a transceiver configured to receive and respond to control signals for turning the lighting circuitry (but not the control electronics) off or on. According to another exemplary embodiment, the lighting fixtures themselves include logic for responding to control signals that include more complex information than “off/on” (e.g., signals with scheduling information, signals with sensed condition attributes, etc.).

Referring still to FIG. 9, process 900 is shown to include providing a user interface for creating groups of lighting fixtures and/or for associating lighting fixture groups with facility zones (step 906). The user interface, as previously described, can include a map or overhead view of a floor plan and icons for the various lighting fixtures serving the facility. Users can group the lighting fixtures via a point and click activity or otherwise. Input received by the user interface can be stored for use by the system and other user interfaces (e.g., scheduling user interfaces) of the system can be updated accordingly. Using the same or a different user interface, a first and second group of lighting fixtures can be associated with different facility zones (step 908). Process 900 is further shown to include the step of providing a user interface for configuring an algorithm for the first group of lighting fixtures (step 910) and the step of providing a user interface for configuring an algorithm for the second group of lighting fixtures (step 911). Steps 910 and 911 can use graphical user interfaces such as those described with reference to FIGS. 6 and 7 or can use any other suitable user interface and collection of user interface elements (e.g., displays, LEDs, buttons, switches, etc.). Based on the input received via the user interface(s), an algorithm implemented by a control module can determine whether to provide a control signal based on a time of day schedule or a sensed facility condition (step 912). Step 912 can include any number of sensor information gathering steps, condition checking activities, and/or scheduling activities. For example, step 912 can include the step of receiving motion sensor information, receiving carbon dioxide sensor information, and comparing the readings to a threshold to make a decision regarding whether the space is occupied. Based on the determination(s) of step 912, the system can provide the control signal to a data communications interface for further communication to the lighting fixtures (step 914). The communication may be wired or wireless and can be sent to a master transceiver for broadcasting or relaying to other lighting fixtures.

Process 900 is further shown to include the step of quantifying a reduction in power obtained by providing (e.g., providing in step 904) and intelligently controlling (e.g., controlling in steps 910, 914) the new (or retrofit) lighting fixtures (step 916). The quantification can compare current power usage for the new lighting fixtures to metrics recorded and stored in step 902, compare recent power usage, average recent power usage, consider actual power usage on a minute-by-minute basis, gather usage information from a utility company, gather usage information from a utility billing system, prompt the user for utility billing information, multiply a new daily power usage by the number of days in a year, multiply the power usage by a power cost, and conduct any additional or alternative sub-steps for quantifying the difference in power consumption or cost between the old lighting system and the new lighting system with control algorithm(s). Indicia of the quantification can then be stored in a memory device and/or displayed on an electronic display (step 918). It should be appreciated that other output activities are also possible (e.g., generating a graph, generating a “real-time” counter, ticker or dial, generating a detailed report, e-mailing a report, etc.).

The foregoing description of exemplary embodiments of the invention have been presented for purposes of illustration and of description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. The functionality described may be distributed among modules that differ in number and distribution of functionality from those described herein. Additionally, the order of execution of the functions may be changed depending on the embodiment. The embodiments were chosen and described in order to explain the principles of the invention and as practical applications of the invention to enable one skilled in the art to utilize the invention in various embodiments and with various modifications as suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

It should be noted that “electrically coupled” or “coupled” can mean directly or indirectly coupled, according to various exemplary embodiments. For example, in embodiments where sensors are electrically coupled to the control module, the sensors can be directly wired to the control module with no components that substantially change the signal located between the sensor and the control module; in other embodiments the signals sent to the sensors may be provided to one or many components between the sensors and the control module and the sensors and the control module can still be considered electrically coupled (indirectly). Similarly, any data communications via a wireless connection can occur directly or indirectly via a network, relay node, booster node, or any other device.

The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating configuration and arrangement of the preferred and other exemplary embodiments without departing from the spirit of the inventions as expressed herein. 

What is claimed is:
 1. A controller for controlling lighting in a facility provided by a plurality of lighting fixtures configured for wireless communications, the controller comprising: a data communications interface communicating with at least one of the plurality of lighting fixtures; and a control module configured to provide a control signal to the data communications interface for communicating to the at least one of the plurality of lighting fixtures and for at least one of turning on and turning off the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility, the control module configured to determine the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of heat within the facility, wherein the control module is configured to compare the level of heat within the facility with a heat threshold associated with human occupation, and wherein the control module is further configured to quantify a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm, and wherein the control module is configured to quantify the reduction in power by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm.
 2. The controller of claim 1, wherein the controller is a master controller for the plurality of lighting fixtures.
 3. The controller of claim 1, further comprising: a user interface for receiving programming inputs from a user and configured to provide the inputs to the control module.
 4. The controller of claim 3, wherein the user interface allows the user to manually control the behavior of the lighting fixtures.
 5. The controller of claim 4, wherein the user interface is configured to provide at least one user interface element for allowing the user to specify which of providing the control signal based on time of day and providing the control signal based on a sensed condition relating to use of the facility to use by the algorithm.
 6. The controller of claim 5, wherein the user interface is configured to provide at least one user interface element for allowing the user to override the algorithm.
 7. The controller of claim 6, wherein the user interface is configured to provide at least one user interface element for allowing the user to control at least a second group of lighting fixtures in addition to a first group of lighting fixtures formed by the plurality of lighting fixtures, and wherein the algorithm applied to the first group of lighting fixtures can also be applied to the second group of lighting fixtures.
 8. The controller of claim 7, wherein the user interface element is at least one of a switch, a touch screen area, a button, and a hyperlink, and wherein the user may select a time duration for the override using the user interface.
 9. A method for controlling lighting in a facility provided by a plurality of lighting fixtures configured for wireless communications, the method comprising: determining whether to provide a control signal to at least one of the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility; determining the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of sound within the facility; comparing the level of sound within the facility with a sound threshold associated with human occupation; providing the control signal to a data communications interface for communication to the at least one of the plurality of lighting fixtures; and quantifying a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm; and storing indicia of the reduction in power in a memory device, displaying indicia of the reduction in power on an electronic display, or storing indicia of the reduction in power in the memory device and displaying indicia of the reduction in power on the electronic display.
 10. The method of claim 9, further comprising: providing the plurality of lighting fixtures; installing the plurality of lighting fixtures; and creating at least a first group of lighting fixtures and a second group of lighting fixtures from the plurality of lighting fixtures.
 11. The method of claim 10, further comprising: providing a user interface configured to allow the configuration of the first group of lighting fixtures and the second group of lighting fixtures, wherein the configuration specifies which of control based on time of day and a sensed condition to use by the first group of lighting fixtures and the second group of lighting fixtures.
 12. The method of claim 11, further comprising: manually controlling the first group of lighting fixtures and the second group of lighting fixtures via the user interface.
 13. The method of claim 12, further comprising: adjusting the composition of the first group of lighting fixtures and the second group of lighting fixtures via the user interface.
 14. The method of claim 9, further comprising: electrically coupling a first wireless transceiver to one of the plurality of lighting fixtures to configure the plurality of lighting fixtures for the wireless communications, wherein the wireless communications are bi-directional.
 15. A system for controlling lighting in a facility, the system comprising: a plurality of lighting fixtures configured for wireless communications; a data communications interface communicating with at least one of the plurality of lighting fixtures, wherein the at least one of the plurality of lighting fixtures communicates with at least a second of the plurality of lighting fixtures via wireless communications; and a control module configured to provide a control signal to the data communications interface for communicating to the at least one of the plurality of lighting fixtures and for at least one of turning on and turning off the plurality of lighting fixtures according to an algorithm that generates the control signal based on a time of day and an occupancy within the facility, the control module configured to determine the occupancy within the facility based on a sensed condition relating to motion within the facility and a level of at least one of heat and sound within the facility, wherein the control module is configured to compare the level of the at least one of heat and sound within the facility with at least one of a heat and sound threshold associated with human occupation, wherein the control module is further configured to quantify a reduction in power obtained by controlling the plurality of lighting fixtures according to the algorithm, and wherein the control module is configured to quantify the reduction in power by calculating the difference of (A) a first amount of power used by the lighting without control according to the algorithm with (B) a second amount of power used by the lighting as controlled by the algorithm.
 16. The system of claim 15, wherein turning off the plurality of lighting fixtures comprises turning off the light emitting circuitry of the lighting device while continuing to power the communications circuitry of the lighting device.
 17. The system of claim 15, wherein the at least one of the plurality of lighting fixtures includes a master transceiver wired to the data communications interface, the master transceiver configured for bi-directional wireless communication with transceivers coupled to other of the plurality of lighting fixtures; wherein the at least one of the plurality of lighting fixtures includes a radio frequency transceiver for bi-directional wireless communication with the data communications interface.
 18. The system of claim 15, further comprising: an occupancy sensor for determining if a zone of the facility lit by the plurality of lighting fixtures is occupied, the occupancy sensor configured to provide a signal indicating occupancy to at least one of the data communications interface, the at least one of the plurality of lighting fixtures, and the control module, wherein the occupancy sensor is physically coupled to the at least one of the plurality of lighting fixtures, wherein the occupancy sensor is electrically coupled to a transmitter configured to provide the signal indicating occupancy to at least one of the data communications interface, the at least one of the plurality of lighting fixtures, and the control module via radio frequency communications.
 19. The system of claim 15, wherein at least one of the plurality of lighting fixtures includes a transceiver which has been retrofit to the lighting fixture by placement in series with the power input for the lighting fixture.
 20. The system of claim 15, wherein the data communications interface is also configured to communicate with another type of building component in addition to lighting fixtures, wherein the another type of building component includes at least one of a fan, an air handling unit, and a heating system; and wherein the control module selectively provides sensed condition based control and time of day based control to the another type of building component via the data communications interface. 